/* CoralCube | Massively Multiplayer Online Role-Playing Game(MMORPG) Emulator.
|* 
|* Copyright (C) 2005-2010 MaNGOS <http://getmangos.com/>
|*               2008-2010 TrinityCore <http://www.trinitycore.org/>
|*               2008-2010 CoralCube <http://www.CoralCube.com/>
|*
|* This program is free software. You can redistribute it and/or modify it under the terms of 
|* the GNU General Public License as published by the Free Software Foundation, either 
|* version 2 of the License.
|*
|* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY, 
|* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
|* See the GNU General Public License for more details.
|*
|* You should have received a copy of the GNU General Public License along with this program. 
|* If not, see <http://www.gnu.org/licenses/>.
|*/

#ifndef CORE_MOVEMENTGENERATOR_H
#define CORE_MOVEMENTGENERATOR_H

#include "Define.h"
#include <ace/Singleton.h>
#include "ObjectRegistry.h"
#include "FactoryHolder.h"
#include "Common.h"
#include "MotionMaster.h"

class Unit;

class MovementGenerator
{
public:
    virtual ~MovementGenerator();

    virtual void Initialize(Unit &) = 0;
    virtual void Finalize(Unit &) = 0;

    virtual void Reset(Unit &) = 0;

    virtual bool Update(Unit &, const uint32 &time_diff) = 0;

    virtual MovementGeneratorType GetMovementGeneratorType() = 0;

    virtual void unitSpeedChanged() { }

    virtual bool GetDestination(float& /*x*/, float& /*y*/, float& /*z*/) const { return false; }
};

template<class T, class D>
class MovementGeneratorMedium : public MovementGenerator
{
public:
    void Initialize(Unit &u)
    {
        //u->AssertIsType<T>();
        (static_cast<D*>(this))->Initialize(*((T*)&u));
    }
    void Finalize(Unit &u)
    {
        //u->AssertIsType<T>();
        (static_cast<D*>(this))->Finalize(*((T*)&u));
    }
    void Reset(Unit &u)
    {
        //u->AssertIsType<T>();
        (static_cast<D*>(this))->Reset(*((T*)&u));
    }
    bool Update(Unit &u, const uint32 &time_diff)
    {
        //u->AssertIsType<T>();
        return (static_cast<D*>(this))->Update(*((T*)&u), time_diff);
    }
public:
    // will not link if not overridden in the generators
    void Initialize(T &u);
    void Finalize(T &u);
    void Reset(T &u);
    bool Update(T &u, const uint32 &time_diff);
};

struct SelectableMovement : public FactoryHolder<MovementGenerator,MovementGeneratorType>
{
    SelectableMovement(MovementGeneratorType mgt) : FactoryHolder<MovementGenerator,MovementGeneratorType>(mgt) { }
};

template<class REAL_MOVEMENT>
struct MovementGeneratorFactory : public SelectableMovement
{
    MovementGeneratorFactory(MovementGeneratorType mgt) : SelectableMovement(mgt) { }

    MovementGenerator* Create(void *) const;
};

typedef FactoryHolder<MovementGenerator,MovementGeneratorType> MovementGeneratorCreator;
typedef FactoryHolder<MovementGenerator,MovementGeneratorType>::FactoryHolderRegistry MovementGeneratorRegistry;
typedef FactoryHolder<MovementGenerator,MovementGeneratorType>::FactoryHolderRepository MovementGeneratorRepository;
#endif
